DEWALT DC9182 18V XRP Lithium Ion Battery XRP li-ion extended run-time battery provides long run-time & battery life Lightweight design No memory and virtually no self-discharge for maximum productivity and less Downtime Powerful and long-lasting; no memory or self-discharge The battery fits all DeWALT 18-volt Tools Weighs only 1.1 lbs Must be charged with these DeWALT chargers, DC9310, DC9320 or DC9319